There is a new glitch discovered.

On older versions of Fireman Sam Match the Shadows, you can click on the same thing six times on the last two levels. As far as I know, the glitch cannot be done on the Cartoonito website (which hosts the newer version) as it was patched -- you should do it on an external website like Y8.

It does not work on the first level.

If you want to do a glitchless run, I recommend using the Cartoonito website as you can spam click without encountering the glitch.